Drew Barrymore on April 19, 2012 in Los Angeles after seeing a concert at Nokia Theater. Credit: BONI/AKM-GSI

Drew Barrymore's not ready to flaunt her baby bump just yet!

On Thursday, the pregnant star, 37, headed to a Gotye concert in L.A., where she rocked Paige Denim's "Somersault" stretch jeans.

She accessorized the printed pants with a bright orange necklace, Converse sneakers--and concealed her growing bump in an oversized gray sweater.

Though the star has yet to confirm her pregnancy, a source tells Us Weekly that the Big Miracle star and her art consultant fiance, Will Koppelman, are ecstatic about welcoming their first child together.

"They have been trying to get pregnant," the Barrymore insider shares. "That's why they got engaged. They are very happy! She's ready to settle down and be a mom."